my quad is really starting to annoy me because it will not start kind of. what it does is, it starts after i kick it a hundred times then runs for 15 secs and shuts of. then kick so more and shut after 1 or 2 secs and then it continues to shut off after 1 or 2 secs. i've changed spark plugs and checked for spark. what happens is most of the time it dosent spark and every once in a while it does. anyone have an idea?